NAME<\/a> X25519, X448 \u2212 EVP_PKEY X25519 and X448 support<\/p>\n The X25519<\/b> and X448<\/b> EVP_PKEY<\/small> implementation supports key generation and key derivation using X25519<\/b> and X448<\/b>. It has associated private and public key formats compatible with RFC 8410.<\/small><\/p>\n No additional parameters can be set during key generation.<\/p>\n The peer public key must be set using EVP_PKEY_derive_set_peer()<\/b> when performing key derivation.<\/p>\n A context for the X25519<\/b> algorithm can be obtained by calling:<\/p>\n EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);<\/p>\n For the X448<\/b> algorithm a context can be obtained by calling:<\/p>\n EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X448, NULL);<\/p>\n X25519 or X448 private keys can be set directly using EVP_PKEY_new_raw_private_key<\/b>(3) or loaded from a PKCS#8 private key file using PEM_read_bio_PrivateKey<\/b>(3) (or similar function). Completely new keys can also be generated (see the example below). Setting a private key also sets the associated public key.<\/p>\n X25519 or X448 public keys can be set directly using EVP_PKEY_new_raw_public_key<\/b>(3) or loaded from a SubjectPublicKeyInfo structure in a PEM<\/small> file using PEM_read_bio_PUBKEY<\/b>(3) (or similar function).<\/p>\n This example generates an X25519<\/b> private key and writes it to standard output in PEM<\/small> format:<\/p>\n #include The key derivation example in EVP_PKEY_derive<\/b>(3) can be used with X25519<\/b> and X448<\/b>.<\/p>\n
DESCRIPTION<\/a>
NOTES<\/a>
EXAMPLES<\/a>
SEE ALSO<\/a>
COPYRIGHT<\/a> <\/p>\n
\nNAME <\/a> <\/h2>\n
DESCRIPTION <\/a> <\/h2>\n
NOTES <\/a> <\/h2>\n
EXAMPLES <\/a> <\/h2>\n
#include
…
EVP_PKEY *pkey = NULL;
EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X25519, NULL);
EVP_PKEY_keygen_init(pctx);
EVP_PKEY_keygen(pctx, &pkey);
EVP_PKEY_CTX_free(pctx);
PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL);<\/p>\nSEE ALSO <\/a> <\/h2>\n